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-rw-r--r--include/linux/omap-iommu.h52
1 files changed, 52 insertions, 0 deletions
diff --git a/include/linux/omap-iommu.h b/include/linux/omap-iommu.h
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index 00000000000..cac78de09c0
--- /dev/null
+++ b/include/linux/omap-iommu.h
@@ -0,0 +1,52 @@
+/*
+ * omap iommu: simple virtual address space management
+ *
+ * Copyright (C) 2008-2009 Nokia Corporation
+ *
+ * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _INTEL_IOMMU_H_
+#define _INTEL_IOMMU_H_
+
+struct iovm_struct {
+ struct omap_iommu *iommu; /* iommu object which this belongs to */
+ u32 da_start; /* area definition */
+ u32 da_end;
+ u32 flags; /* IOVMF_: see below */
+ struct list_head list; /* linked in ascending order */
+ const struct sg_table *sgt; /* keep 'page' <-> 'da' mapping */
+ void *va; /* mpu side mapped address */
+};
+
+#define MMU_RAM_ENDIAN_SHIFT 9
+#define MMU_RAM_ENDIAN_LITTLE (0 << MMU_RAM_ENDIAN_SHIFT)
+#define MMU_RAM_ELSZ_8 (0 << MMU_RAM_ELSZ_SHIFT)
+#define IOVMF_ENDIAN_LITTLE MMU_RAM_ENDIAN_LITTLE
+#define MMU_RAM_ELSZ_SHIFT 7
+#define IOVMF_ELSZ_8 MMU_RAM_ELSZ_8
+
+struct iommu_domain;
+
+extern struct iovm_struct *omap_find_iovm_area(struct device *dev, u32 da);
+extern u32
+omap_iommu_vmap(struct iommu_domain *domain, struct device *dev, u32 da,
+ const struct sg_table *sgt, u32 flags);
+extern struct sg_table *omap_iommu_vunmap(struct iommu_domain *domain,
+ struct device *dev, u32 da);
+extern u32
+omap_iommu_vmalloc(struct iommu_domain *domain, struct device *dev,
+ u32 da, size_t bytes, u32 flags);
+extern void
+omap_iommu_vfree(struct iommu_domain *domain, struct device *dev,
+ const u32 da);
+extern void *omap_da_to_va(struct device *dev, u32 da);
+
+extern void omap_iommu_save_ctx(struct device *dev);
+extern void omap_iommu_restore_ctx(struct device *dev);
+
+#endif